package final2107.day02;

import java.util.TreeMap;

public class StuTest {
    public static void main(String[] args) {
        TreeMap<Stu,Integer> map = new TreeMap<>();
        map.put(new Stu(),90);
        map.put(new Stu(),80);
        map.put(new Stu(),70);
        map.put(new Stu(),60);
        System.out.println(map);
    }
}
